8-K: Energy Vault Amends Debentures, Updates 2025 Financial Outlook

Energy Vault Holdings, Inc. announced amendments to its convertible debentures, providing updated financial estimates for Q4 and full-year 2025, alongside new strategic project developments.

Summary

• Energy Vault Holdings, Inc. (NRGV) entered into a Second Amendment to its Securities Purchase Agreement with YA II PN, Ltd. on February 9, 2026, and amended and restated its Tranche 1, Tranche 2, and Tranche 3 convertible debentures.
• The original principal amount across all three tranches of debentures totals $65.0 million, with $58.0 million currently outstanding.
• The debentures carry an annual interest rate of 7.00%, which increases to 18.00% upon an Event of Default.
• Maturity dates for Tranche 1 and Tranche 2 debentures are March 22, 2027, while Tranche 3 matures on August 30, 2027.
• Conversion prices vary by tranche: Tranche 1 has a fixed price of $4.50, Tranche 2 at $7.53, and Tranche 3 at $7.41, with market-based conversion options subject to a $0.60 floor price.
• The amendments introduce additional covenant flexibility, enhanced call protection for Tranche 1 debentures, and a mandatory redemption requirement for 100% of outstanding principal upon certain debt financings, subject to holder waiver.
• Preliminary estimated revenue for the full year ended December 31, 2025, is projected to be between $200.0 million and $205.0 million, a significant increase from $46.2 million in 2024.
• Preliminary estimated gross margin for FY2025 is expected to range from 22% to 25%, up from 13.4% in 2024.
• The company anticipates a net loss for FY2025 between $104.9 million and $92.4 million, an improvement from a $135.8 million net loss in 2024.
• Adjusted EBITDA for FY2025 is estimated to be between $(26.0) million and $(21.0) million, compared to $(57.9) million in 2024.
• For Q4 2025, preliminary estimates include revenue of $150.0 million to $155.0 million, gross margin of 18% to 22%, net loss of $22.1 million to $9.5 million, and positive adjusted EBITDA of $5.0 million to $10.0 million.
• As of February 5, 2026, the company reported approximately $46.9 million in cash and cash equivalents, $47.7 million in restricted cash, and $92.9 million in total long-term debt.
• Strategic developments include the start of construction for the 150 MW / 300 MWh SOSA Energy Center in Texas (expected Q2 2027 commercial operation) and a 14-year Long-Term Energy Service Agreement for the 100 MW / 870 MWh EBOR Battery Energy Storage System project in Australia (expected 2028 operations).
• Energy Vault also announced a definitive supply agreement with Peak Energy for 1.5 gigawatt-hours of sodium-ion battery systems and a strategic framework agreement with Crusoe for phased deployment of modular data centers in Snyder, Texas, scalable up to 25 MW, with planned deployments in 2026.

Sentiment

Score: 6

Explanation: StockSavvy.ai views this filing as moderately positive. While the company shows significant year-over-year financial improvements and strategic project wins, the continued full-year net loss and the inherent risks of a nascent industry, coupled with the terms of the convertible debentures, temper overall enthusiasm.

Positives

• Preliminary estimated revenue for FY2025 is projected to be $200.0 million to $205.0 million, a substantial increase from $46.2 million in 2024, indicating strong top-line growth.
• Preliminary estimated GAAP gross margin for FY2025 is expected to improve to 22% to 25% from 13.4% in 2024, suggesting better operational efficiency.
• The estimated net loss for FY2025 is significantly reduced to between $104.9 million and $92.4 million, compared to $135.8 million in 2024.
• Adjusted EBITDA for Q4 2025 is projected to be positive, ranging from $5.0 million to $10.0 million, a notable turnaround from $(13.4) million in Q4 2024.
• The company commenced construction on the 150 MW / 300 MWh SOSA Energy Center in Texas, marking the first project under its Asset Vault platform.
• Energy Vault secured a 14-year Long-Term Energy Service Agreement for the 100 MW / 870 MWh EBOR Battery Energy Storage System project in Australia, expanding its international footprint and project pipeline.
• A strategic supply agreement with Peak Energy for 1.5 GWh of U.S. manufactured sodium-ion battery systems enhances supply chain security and technology diversification.
• The strategic framework agreement with Crusoe for modular data center deployments up to 25 MW represents a new market opportunity for energy storage solutions.

Negatives

• Despite significant improvements, the company still projects a net loss for the full year 2025, ranging from $104.9 million to $92.4 million.
• Adjusted EBITDA for the full year 2025 remains negative, estimated between $(26.0) million and $(21.0) million.
• The debentures carry a high interest rate of 18.00% upon an Event of Default, which could significantly increase financing costs if financial covenants are breached.
• The company's limited operating history and reliance on a few customers for the majority of its revenue present ongoing business risks.
• The preliminary financial estimates are unaudited and subject to change, which could result in material adjustments.

Risks

• Limited operating history and a rapidly evolving industry make it difficult to evaluate the business, risks, and future prospects.
• Projections are subject to significant risks, assumptions, estimates, and uncertainties, which may cause actual results to differ materially.
• The profitability of owned projects is highly sensitive to projections, and deviations could result in lower profitability or losses.
• The business model depends on customer acceptance of technology, retaining existing customers, obtaining new customers, and the overall success of the business model.
• Energy storage systems involve lengthy sales and installation cycles, which can lead to significant fluctuations in results, incurred expenses without offsetting revenue, and increased risk of customer payment defaults or cancellations.
• Dependence on a limited number of customers for the majority of revenue, with the loss of any significant customer potentially causing substantial revenue reduction and liquidity impact.
• Continuous refinement of system engineering to improve cost and efficiency has no guarantee of successful implementation under the expected schedule.
• The business depends on the ability to successfully implement energy storage systems and introduce innovative and competitive technologies, with risks of higher costs or later implementation than expected.
• Inability to reduce the cost structure in the future may impair profitability, as equipment and construction costs, as well as other expenses, could increase.
• Operational costs can be difficult to predict and may include significant expenses related to the decommissioning of systems.
• Heavy reliance on complex machinery for operations, with significant uncertainty and risk in terms of operational performance and costs, including unexpected malfunctions and unavailability of repairs/spare parts.
• Significant upfront costs for energy storage systems, requiring the company and its customers to obtain third-party financing, which may not be available or may exceed estimates.
• The economic benefit of energy storage systems depends on the cost of electricity from alternative sources, and systems may not be cost-competitive in some markets.
• Energy storage systems performance may not meet customer expectations or needs, leading to operational issues, outages, and potential adverse effects on future sales.
• Inaccurate estimates of the useful life for energy storage systems or failure to meet service and warranty performance guarantees could adversely affect business and financial results.
• No assurance that alternative, co-active use case opportunities for systems exist or would be as beneficial as expected.
• Non-binding letters of intent and other indications of interest may not result in binding orders or sales, leading to lower-than-expected operating results and cash flows.
• Future growth depends upon the ability to maintain relationships with third parties (e.g., EPC firms, strategic partners), and the terms and enforceability of these relationships are not always certain.
• Dependence on third-party component and product manufacturing and logistical services, many located outside the U.S., exposes the company to business interruptions, delayed deliveries, and diminished control.
• Inability to achieve strategic priorities in emerging markets due to bureaucratic intrusions, political unrest, fluctuating currencies, and corruption.
• Failure or inability of suppliers to deliver necessary components or raw materials in a timely manner could cause installation delays, cancellations, penalty payments, and reputational damage.
• Supply chain interruptions, exacerbated by global political tensions and public health emergencies, could negatively impact the ability to acquire necessary raw materials and components.
• Systems often rely on interconnections to third-party distribution and transmission facilities, exposing them to interconnection and transmission facility development and curtailment risks.
• Business is subject to risks associated with construction, cost overruns, and delays, including those related to obtaining government permits and approvals and electrical interconnection.
• H-Vault products are based on novel deployments of established principles, and potential customers may be hesitant to make significant investments, especially with declining costs of competing technologies like lithium-ion batteries.
• Additional risks arise when the company owns and operates energy storage systems (tolling arrangements) compared to a build-and-transfer model, including financing challenges, increased operational costs, and regulatory restrictions.
• Increasing attention to, and scrutiny of, ESG matters could increase costs, harm reputation, impact share price or access to capital, or otherwise adversely impact the business.
• Future acquisitions would be subject to risks associated with integration, diversion of management resources, potential dilution, and exposure to unknown liabilities.
• International operations expose the company to additional risks, including conformity with business customs, lack of government incentives, financing challenges, and compliance with diverse laws and regulations.
• Future growth is dependent upon the pace and depth of energy storage technologies, which are emerging industries, as well as competition, and slower-than-expected market development could adversely affect the business.
• Operation in highly competitive energy industries with competitors often having significantly more financial and other resources, potentially harming competitive positioning and operating results.
• Inability to attract and retain key employees and hire qualified management, technical, engineering, and sales personnel could harm the ability to compete and grow the business.
• Labor disputes could disrupt the ability to serve customers and/or lead to higher labor costs.
• Changes in business, economic, or political conditions, including overall changes in demand, inflation, interest rate fluctuations, and economic slowdowns, are beyond control and could impact the business.
• The productivity of facilities, supply chain operations, and product demand/performance may be affected by factors outside of control, such as natural catastrophic events, wars, and pandemics.
• Subject to a series of risks related to climate change, including meteorological phenomena, chronic environmental changes, and increased operational/capital expenditures.
• Subject to certain risks associated with the energy transition, including costs of transitioning to lower emissions technologies, risks of new technologies not proving successful, and volatility in input prices.
• Fuel prices, including volatility in the cost of diesel or natural gas, or a prolonged period of low costs, could decrease incentives to transition to renewable energy.
• Insurance coverage, customer indemnifications, or other liability protections may be unavailable or inadequate to cover all significant risks, which could adversely affect profitability and financial position.

Future Outlook

Energy Vault anticipates the SOSA Energy Center to achieve commercial operation by the second quarter of 2027 and the EBOR Battery Energy Storage System project to commence operations in 2028, subject to approvals. Planned deployments for Crusoe Spark modular data centers are expected in 2026, scalable up to 25 MW. The company is transitioning to an ownership interest in energy storage assets, moving beyond a build-and-transfer or licensing model, and expects future growth to be driven by declining costs of renewable power generation and battery manufacturing, increasing demand for clean energy solutions, and the adoption of digital software applications for grid efficiency.

Industry Context

StockSavvy.ai notes that Energy Vault's strategic shift towards owning and operating energy storage assets, alongside its traditional build-and-transfer model, positions it to capitalize on the rapidly expanding global demand for electricity and the transition to intermittent renewable energy sources. The company's focus on a diverse technology portfolio, including gravity, battery, and green hydrogen storage, coupled with its energy management system software, addresses critical grid reliability and cost-effectiveness needs. The preliminary financial estimates for 2025, particularly the significant revenue growth and improved gross margins, suggest that Energy Vault is gaining traction in this competitive and evolving market. However, the continued net losses and negative full-year adjusted EBITDA highlight the substantial investment required in this nascent industry, where long sales cycles and high upfront costs are common challenges. The strategic agreements for sodium-ion batteries and data center deployments indicate an adaptive approach to technology and market expansion.

Comparison to Industry Standards

• Energy Vault operates in a highly competitive energy storage market, competing with established players and emerging technologies.
• Direct competitors in battery energy storage solutions (BESSs) include Tesla, Inc., Fluence Energy, Inc., LG Chem, Ltd., Samsung Electronics Co., Ltd, and Contemporary Amperex Technology Co. Limited (CATL), which have already commercialized their products.
• Competitors in broader energy storage, including alternative technologies, include ESS Inc., Eos Energy Enterprises Inc., Hydrostor Inc., and Primus Power, some of whom have demonstrated prototypes.
• In energy management software, Energy Vault competes with companies like Tesla, Inc., Fluence Energy, Inc., and Wartsila Corporation, which have developed or are developing their own platforms.
• The company's preliminary 2025 revenue growth from $46.2 million to $200.0-$205.0 million (over 300% increase) is indicative of strong market penetration, potentially outpacing some industry peers in terms of growth rate, though absolute revenue figures would need to be compared against specific competitors' reported results for a direct comparison.
• The improvement in GAAP gross margin from 13.4% to 22-25% suggests a positive trend in cost management and pricing power, which is crucial in a market where component costs (e.g., lithium-ion batteries) have seen significant fluctuations.
• The shift to a positive Adjusted EBITDA in Q4 2025 ($5.0-$10.0 million) from a negative $13.4 million in Q4 2024 indicates a potential inflection point towards operational profitability, a key benchmark for emerging technology companies in capital-intensive sectors.

Corporate Governance

Related Party Transactions

• Energy Vault Holdings, Inc. has entered into a Securities Purchase Agreement and subsequent amendments with YA II PN, LTD., who is the Holder of the convertible debentures.

Stakeholder Impact

• **Shareholders**: Potential for dilution from debenture conversions, but also benefit from improved financial performance and strategic growth initiatives. Share price could be influenced by the mixed financial outlook and strategic developments.
• **Debenture Holders (YA II PN, LTD.)**: Benefit from amended terms providing covenant flexibility, call protection, and mandatory redemption options, enhancing their investment security and potential returns.
• **Employees**: Continued growth and strategic expansion may lead to increased employment opportunities, but risks related to attracting and retaining key talent remain.
• **Customers**: Benefit from new project developments (SOSA, EBOR) and strategic supply agreements (Peak Energy), potentially leading to more robust and diverse energy storage solutions. However, risks of project delays and performance issues persist.
• **Suppliers**: Strategic agreements like the one with Peak Energy indicate strong demand for components, but the company's reliance on a limited number of third-party suppliers introduces supply chain risks.
• **Creditors**: The amended debenture terms, including mandatory redemption upon certain debt financings, directly impact the company's debt structure and repayment obligations.

Next Steps

• Achieve commercial operation for the SOSA Energy Center by the second quarter of 2027.
• Obtain necessary contractual and regulatory approvals for the EBOR Battery Energy Storage System project to commence operations in 2028.
• Proceed with planned deployments of Crusoe Spark modular data centers in Snyder, Texas, expected in 2026.
• Continue to implement improvements in engineering to enhance system cost and efficiency.
• Manage equipment and construction costs to expand market share and achieve profitability.
• Attract third-party financing for owned projects and customer purchases of energy storage systems.
• Develop and maintain relationships with third-party engineering, procurement, and construction (EPC) firms and other strategic partners.
• Monitor and comply with evolving ESG regulations and stakeholder expectations.
• Potentially pursue future acquisitions to complement existing business and expand the Build-Own-Operate model.

Key Dates

Recommendation

The filing presents a mixed bag for investors. While Energy Vault shows significant year-over-year improvements in key financial metrics like revenue and gross margin, and projects a positive adjusted EBITDA for Q4 2025, the company still anticipates a full-year net loss and negative adjusted EBITDA. The strategic project wins and supply agreements are positive indicators for future growth and market positioning in the emerging energy storage sector. However, the business operates in a highly competitive and capital-intensive industry with numerous inherent risks, including lengthy sales cycles, reliance on limited customers and suppliers, and the need for substantial financing. The convertible debentures, while providing capital, also carry high default interest rates and potential for dilution. Given the strong growth trajectory but persistent profitability challenges and significant operational risks, a 'hold' recommendation is appropriate for seasoned investors to monitor execution and market acceptance before making further commitments.

Keywords

Energy storage, Convertible debentures, Renewable energy, Battery energy storage systems, Gravity energy storage, Green hydrogen storage, Financial outlook, SEC filing, NRGV, Clean energy, Project development, Corporate finance, Debt financing, Strategic agreements, Adjusted EBITDA, Gross margin, Risk factors